Glucose Oxidation on Gold-modified Copper Electrode

Title
Glucose Oxidation on Gold-modified Copper Electrode
Authors
임지은안상현표성규손형빈장종현김수길
Keywords
Glucose; Bio fuel cell; Electrochemical oxidation; Catalyst
Issue Date
2013-09
Publisher
Bulletin of the Korean Chemical Society
Citation
VOL 34, NO 9, 2685-2690
Abstract
The activities of Au-modified Cu electrodes toward glucose oxidation are evaluated according to their fabrication conditions and physico-chemical properties. The Au-modified Cu electrodes are fabricated by the galvanic displacement of Au on a Cu substrate and the characteristics of the Au particles are controlled by adjusting the displacement time. From the glucose oxidation tests, it is found that the Au modified Cu has superior activity to the pure Au or Cu film, which is evidenced by the negative shift in the oxidation potential and enhanced current density during the electrochemical oxidation. Though the activity of the Au nanoparticles is a contributing factor, the enhanced activity of the Au-modified Cu electrode is due to the increased oxidation number of Cu through the electron transfer from Cu to more electronegative Au. The depletion of electron in Cu facilitates the oxidation of glucose. The stability of the Au-modified Cu electrode was also studied by chronoamperometry.
URI
http://pubs.kist.re.kr/handle/201004/45828
ISSN
02532964
Appears in Collections:
KIST Publication > Article
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